C00A3
Driveline Control Module Rear Differential Unit A Control Circuit Driver
C00A3 is an OBD-II diagnostic trouble code meaning: Driveline Control Module Rear Differential Unit A Control Circuit Driver. Common causes: open or short circuit in wiring harness, differential solenoid valve malfunction. Estimated repair cost: $56–278.
Symptoms
- Check engine light comes on
- Reduced all-wheel drive efficiency
- Unusual noises from the rear of the car
- Handling problems on slippery roads
Causes
- Open or short circuit in wiring harness
- Differential solenoid valve malfunction
- Damage to the rear differential control module
- Poor contact in connectors
- Power or grounding problems
How to Fix
- Check wiring harness for damage
- Check the resistance and operation of the solenoid valve
- Inspect connectors for corrosion or damage
- Check circuit power and grounding
- If necessary, replace the differential control module
Related codes
Error C00A3 by Vehicle Brand
FAQ
What does the C00A3 code mean?
C00A3 is an OBD-II diagnostic trouble code that indicates: Driveline Control Module Rear Differential Unit A Control Circuit Driver
What causes a C00A3 error code?
The most common causes of C00A3 include: Open or short circuit in wiring harness; Differential solenoid valve malfunction; Damage to the rear differential control module; Poor contact in connectors.
How do I fix a C00A3 diagnostic trouble code?
To fix C00A3: Check wiring harness for damage. Check the resistance and operation of the solenoid valve. Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C00A3?
Limited driving only, diagnose soon
How much does it cost to fix C00A3?
The estimated repair cost for C00A3 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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